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Earthquakes

TermDefinition
Stress force that acts on rock to change its shape or volume
Tension pulls on the crust, stretches rock causing it to become thinner in the middle
Compression squeezes and pushes rock together until it folds or breaks
Shearing pushes two masses of rock in two opposite directions, can cause masses of rock to slip
Faults occur along boundaries, where the forces of the plate motion push or pull the crust so much that the crust breaks
Hanging Wall rock that lies above the fault
Footwall rock that lies below the fault
Normal Faults fault is at an angle, so one block of rock lies above the fault (hanging wall) while the other block lies below the fault (footwall)
Reverse Faults caused by compression. They have the same structure as a normal fault, but the blocks move in the opposite direction
Strike-Slip Faults rocks on either side of the fault slip past each other sideways, with little up or down motion
Anticline a fold in rock that bends upward into an arch
Syncline a fold in rock that bends downward to form a valley
Folded Mountain
Created by: s730675
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